{"version":"1.0","type":"rich","title":"hw6","description":"A theme river displays the moving average of house property sales prices over time, broken down by property type and bedroom count. The visualization uses a silhouette offset to stack the series symmetrically around a central axis, highlighting each category's contribution. Users can drag and drop colored blocks to reorder the legend, which triggers an immediate redraw of the stacked areas via `d3.stack` and `d3.area`. The chart is built with `d3.csv`, `moment.js` for date parsing, and SortableJS for interactive reordering.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/16ae4d155b8041f0a53e2d4724d6e1eb?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}